Abstract

RESUMEN

La monofilia de la infraclase Lissamphibia ha sido cuestionada. Algunos autores sugieren un origen independiente del Orden Gymnophiona basados en la condición compacta (= estegocrotafía) del cráneo de la cecilias. La presente revisión indica la irrelevancia del estegocrotafismo para establecer las relaciones filogenéticas del grupo. Los datos disponibles sugieren: 1) el estegocrotafismo es secundariamente derivado en cecilias, y 2) Lissamphibia representa un grupo monofilético.

SUMMARY

Unity of modern Amphibians as a natural group

The monophyly of Lissamphibia has been previously questioned. Some authors suggested an independent origin of Gymnophiona based on the solid condition (= stegokrotaphy) of the caecilian skull. The stegokrotaphic condition is irrelevant in establishing the relationships of the group. The available data suggest: 1) stegokrotaphy is secondarily derived in caecilians, and 2) Lissamphibia represents a monophyletic group.

Document Type

Article

Publication Date

1999

Publisher Statement

Copyright © 1999 Sociedad Zoológica del Uruguay . This article first appeared in Boletín de la Sociedad Zoológica del Uruguay 10 (1999): 25-33.

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